Stress relief annealed
A transparent item of a predetermined size that permits unobstructed and undistorted view of a desired area. It may include a frame, have reference markings, grid lines and may be heat strengthened and/or tinted. It is generally used where safety, security, and/or the restriction of foreign matter are required, such as the visual examination of the inside of pressurized tanks, liquid sights, controlled liquid flow, and inspection of equipment enclosed in a housing. See window (as modified); scale, cathode ray tube; scale, plotting; window, metal; window, wood; and window panel, aircraft.
Classification: Pressed or molded glass articles, wired or not, for building or construction;leaded glass windows etc; formed multicellular or foam glass
NSN 6145-01-616-7442
NSN 6685-01-261-4984
NSN 6620-00-456-9539
NSN 5985-00-945-4953
NSN 5895-00-014-6980
NSN 6610-00-430-5208
NSN 6645-01-541-2425
NSN 2925-00-411-0600
NSN 5999-01-342-4838
NSN 5985-01-071-7292
NSN 6150-00-308-2686
NSN 7035-01-256-3973